A question from Superspace and 1001 lessons

[billtodd]

TL;DR Summary

My question is about Eq. (3.8.12) on page 112 of this text:
https://arxiv.org/pdf/hep-th/0108200

I believe that $f'(\Phi(z))=\frac{df(\Phi(z))}{dz}$, I get confused with the prime in $z'$ and is it really just this derivative?
I wonder how many people read this 1983 book.